| 摘要 |
PURPOSE:The title composition excellent in balance among properties such as impact strength, gloss and tensile strength, comprising a rubber-modified polystyrene having a rubbery polymer dispersed in the form of particles, polydimethylsiloxane and a higher fatty acid zinc salt. CONSTITUTION:A rubber-modified polystyrene having a rubbery polymer dispersed in the form of particles of an average particle diameter of 0.20-1.00mu is mixed with 0.005-0.8wt% polydimethylsiloxane having a viscosity at 25 deg.C of 10-10,000cSt and structural units of the formula and 0.01-1wt% higher fatty acid zinc salt (e.g., zinc stearate). |
